Add 3/15 and 28/20
1st number: 3/15, 2nd number: 1 8/20
3/15 + 28/20 is 8/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 20 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 15 × 4 = 60,
3/15 = 3 × 4/15 × 4 = 12/60 - Likewise, for the 2nd fraction, since 20 × 3 = 60,
28/20 = 28 × 3/20 × 3 = 84/60 - Add the two like fractions:
12/60 + 84/60 = 12 + 84/60 = 96/60 - 96/60 simplified gives 8/5
- So, 3/15 + 28/20 = 8/5
In mixed form: 13/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/15+28/20 3/15+56/20 3/30+28/20 3/15+28/40 9/15+28/20 3/15+84/20 3/45+28/20 3/15+28/60 3/75+28/20 21/15+28/20